Boss Checklist mod for Terraria

Boss Checklist is a Terraria mod that adds an interface for tracking and managing the bosses that are available in the game.

So there this problem with my boss checklist where it says that I've already downloaded the thing but I can't seem to find it in my manage mods. I've already restarted the

tModLoader - Boss Checklist - In-game progression checklist., Page 24

Tier list of every single calamity boss (with explanations)

Terraria Boss Checklist #22 - Calamitas! (Expert mode)

Terraria Boss Checklist #1 - The Grand Thunder Bird (Expert mode)

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Two errors occurring on multiplayer server · Issue #839 · tModLoader/tModLoader · GitHub

Boss Checklist and Healthbar Mods Quick Guide! Keep Track of Your Progress Easily

Boss Checklist mod for Terraria

Tier list of every single calamity boss (with explanations)

Steam Workshop::cal mod pack

мод calamity boss checklist｜TikTok Search

So, I was playing Calamity, and for some reason, some of the bosses I've already beaten got unchecked from the checklist? The ones I crossed out are the ones that got unchecked